Linit liquid laundry starch (has borax in it) and is much easier to use. Just pour into glue, add color and swirl. I like hiding "treasure" in flubber (small beads) for kids to find. Great fine motor activity.

It has taken on a life of it's own over here! The girls can't get enough. I see lots more fun science in our future. This would be a fun theme to do over the summer! That's what I originally had in mind & we never got around to it and the girls kept asking about it so we just went for it! :) We are having a blast!

I just wanted to say that I've fallen in love with your blog and I've only been reading through it for a few minutes. The activities you do with your girls look so fun! I've been getting a lot of great ideas for things to work on with my daughter- so thank you!

Oh I just love your educational resources! I would love for you to share your stuff on my site via my weekly homeschooling on the cheap linky: http://3boysandadog.com/deals/2012/homeschooling-on-the-cheap-january-12-2012/

A few months ago we spent $ on silly putty and it was a smidgen of the stuff. We have a ton of it now - much more economical & fun since we made it ourselves! It's amazing what you can replicate at home! You must do it with your cutie pies!

LOVE it! Funny enough, I just made some Gak yesterday at school and was planning to make it this weekend for my own boys! For a new spin, try clear glue...the Flubber becomes translucent. Also, for those who can't find Borax, a 1-to-1 mix of liquid starch and glue will provide similar results. Thanks for all your great ideas!

When I made mine, I didn't mix my borax/water mix into the glue mixture. I just pour it in, let it sit, then reached in and pulled out the globs of flubber. We did work it for a few minutes and it turned out great. Hope this helps!

you can use liquid starch instead of borax which is toxic as i was going to do this and was asked by my boss to risk assess and this is how i found out but the liquid starch is safe hope this helps dont want to be a party pooper sorry

My grandson and I just made this with a no name glue that we got from the $ store its really cool but wont stretch like your flubber, it breaks easy but will go back in place after a few minutes. when you leave it awhile and come back to it,it is one big piece again and very smooth and shiny.he loves the texture and being able to flatten it and break it and put it back together but the next time we will make it with Elmer glue and hope that we get the stretchy flubber :)Thanks so much for posting this we loved making it....then I put him in the tub with glow sticks in the water and turned the lights off and he was in his happy place...it was another thing I saw on Pinterest :)

Just made this tonight with my 3 yr old. we had a blast! making glow in the dark slime later and then a glow in the dark bath! your site is wonderful! Yesterday we did the ivory soap in the microwave. had to cut it into smaller pieces b/c our microwave is little. praised my couponing yesterday since i was wasting soap but it was okay since i got it for free with my coupons lol. thank you so much for some great activities!

I just started homeschooling my 6th grader and we did this experiment today. It is very cool and she is still playing with it. How long will it last if you put it in the ziploc bag everytime you are done with it?

When we make this in our class we keep it white. Each of the students uses water color markers to color it. This results in a marbled effect. Then comes the most fun of all. Something I have found that very few people do. Give everyone a straw (the kind that bends). Have the children make a flat sort of round tortilla. Lay the staw about halfway down the center of the gak. Leave the bendable end plus a little more showing out one side. Fold the gak over like you were making a taco. Pinch all of the edges together. Pinch the gak tight around the straw and blow. Leave the gak on the table to blow until you get good at making bubbles. Some kids can get them as big as 12" or more across. We store each child's in a sealed plastic bag. If they want to blow bubbles the next day I pull the gak out of the corners of the bag into the center and heat in the microwave for 10-15 seconds. It needs to get warm or it won't blow bubbles. It will last about 2 months.

My son loves this!!! He is 6 and loves science and experiments. And of course loves messy, gooey things. This turned out perfectly and was so much cheaper than buying similar "goo" already made at the store. Plus it makes a lot more. He literally plays with it for hours! We've made several batches in many different colors. He finds new things to do with it each time. The latest he loves is cutting it with scissors. Having sensory issues, it's great feedback for him. Thank you so much for posting. We've tried many of your experiments and love them all.

I just made some for our 6 and 3 1/2 year old grandsons who will visit this weekend. My recipe called for 8 ounces of glue, and I think that is rather a lot for one tot. Older kids might like that quantity. I colored one batch with more food coloring than I would recommend. It seems to come off onto my hands. But it will be fine for playing with it at our granite kitchen island.

Thanks so much for this post! My two divas are having a blast this very moment with our own flubber/gak project:) Your directions looked beautiful and the pics were super helpful. Looking forward to trying out more of your experiments!